CVE-2026-27856
Description
Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack. An attacker can use this to determine the configured credentials. Figuring out the credential will lead into full access to the affected component. Limit access to the doveadm http service port, install fixed version. No publicly available exploits are known.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 1:2.3.19.1+dfsg1-2.1+deb12u2 |
| debian | bullseye | fixed | 1:2.3.13+dfsg1-2+deb11u3 |
| debian | forky | fixed | 1:2.4.3+dfsg1-1 |
| debian | sid | fixed | 1:2.4.3+dfsg1-1 |
| debian | trixie | fixed | 1:2.4.1+dfsg1-6+deb13u4 |
| sles | affected | |
References
CWEs
CWE-287
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.